CRU TS4.01 Diurnal Temperature Range averaged over 2x 2 grid boxes
X axis: whole world in 360 1.00° steps,
first point at 179.50° W, last point at 179.50° E
Y axis: regular grid with 180 1.00° steps,
first point at 89.50° S, last point at 89.50° N

Monthly data available from Jan1901 to Dec2016 (1392 months)
Variable dtr (diurnal temperature range) in degrees CelsiusFull metadata.
The associated land/sea mask is available for some operations